CN107700063A - A kind of self-adapting type warp knit tension force intelligent equalization regulates and controls method - Google Patents
A kind of self-adapting type warp knit tension force intelligent equalization regulates and controls method Download PDFInfo
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- CN107700063A CN107700063A CN201711126111.7A CN201711126111A CN107700063A CN 107700063 A CN107700063 A CN 107700063A CN 201711126111 A CN201711126111 A CN 201711126111A CN 107700063 A CN107700063 A CN 107700063A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
- D04B27/10—Devices for supplying, feeding, or guiding threads to needles
- D04B27/12—Tensioning devices for individual threads
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Abstract
The invention discloses a kind of self-adapting type warp knit tension force intelligent equalization to regulate and control method, belongs to tricot machine intelligence equipment control technical field.The present invention utilizes yarn guiding chase comb progress overlap and the angular interval of underlap this mechanical properties, partitioning standards as the different regulation and control periods in the warp tension regulation and control cycle, with this digital process attribute of band yarn different from needle back before different row pins, regulatory factor as warp tension regulation and control amplitude, it can be generated before tricot machine starts production and entirely spend the regulation and control curve in high product cycle period, belong to the feedforward control planned in advance, so as to save yarn tension sensor and tension test and pick-up reponse system, embodiment is more succinct efficient.The method of the present invention all has better adaptivity for the different warp knitting technologies of different warp knit types, and different type of machines.And the present invention further expands the range of choice of warp thread raw material.
Description
Technical field
The present invention relates to a kind of self-adapting type warp knit tension force intelligent equalization to regulate and control method, belongs to tricot machine intelligence equipment control
Technical field.
Background technology
Warp knitting turns into the important branch of knitting technology because of its high braid efficiency, and tricot machine weaves in high speed
When, warp thread need to maintain certain yarn tension could normal lopping, but excessive warp tension peak value, or excessive warp
Yarn tension fluctuates acceleration, can all cause Yarn break or can not lopping, and then influence fabric quality or make production disruption.And
During the lopping braiding of each row of tricot machine, because yarn delivered length is uniform in any section of main shaft angle
Property, and in main shaft angle difference section consume length of yarn mutability, determined from principle in each row
During lopping braiding, the fluctuation of warp tension necessarily occurs, each lopping weaving cycle namely warp tension naturally
One basic cycle of fluctuation.And the elemental motion of the root of this periodicity average tension on warp, exactly tricot machine lopping,
In order to make up this cyclic fluctuation of warp tension change, prior art is compensated using tension rail.
Increase tension rail between let-off mechanism and looping mechanism, pass through the phase interaction between yarn and elasticity tension bar
With being realized using the flexible deformation of tension rail and the elastic elongation of yarn to yarn a certain amount of pre-stored.When tension force is unexpected
During increase, warp thread is tensed, and elasticity tension bar is discharged pre- storage yarn, extenuate the transient state increase of tension force by drops；When tension force is dashed forward
When so reducing, warp thread loosens, and is lifted in elasticity tension bar resilience, delays the transient state drop for mending yarn tension, and complete the temporary of new yarn
Deposit, so as to slow down the slope that warp tension rises or falls, and cut down the peak value of tension fluctuation.It is this to be transmitted in itself by yarn
Tension force, and then the working mechanism for forcing tension rail be deformed, determine that balanced regulation and control of the tension rail to warp tension are a kind of
Passive reaction type adjustment, while also determine that the warp thread for participating in braiding itself have to possess certain coefficient of elasticity and fracture is strong
Degree, the mechanically flexible of ability tension of engagement bar carry out normal work.Therefore, for the high glass fibre of poor flexibility modulus, metal
The warp knit raw material such as silk, silk, and the atural staple fibre class warp knit raw material that the small fracture strength of the twist is low, production practices channel syndrome
It is bright, using this passive reaction type warp tension regulation and control method of tension rail, it has been difficult to ensure that the high-speed and continuous warp of low end breakage rate
Compile production.
A kind of warp knit positive type tension compensating mechanism, the method for the device are disclosed in patent CN201710378790.0
It is characterized as：Average tension on warp is measured using resistance strain gauge, and when yarn tension increases extremely, signal is passed into coding
Device, encoder feed back to controller as electronic signals, and controller controls the angle of the rigid tension rail of voice coil motor adjustment again.
Although this method realizes to the compensation of the positive type of average tension on warp to a certain extent, due to its compensation opportunity and
Compensation rate depends entirely on the measurement value of feedback of resistance-strain type tensiometer, namely in sequential, remains that first tensioned ripple
Dynamic generation, then the just compensation of tensioned fluctuation, still falls within reaction type control in mechanism.Due to dynamic tension measurement
The limitation of the timeliness of filtering and tension signal feedback processing, this method is for high-modulus and low intensive warp thread raw material, still
The equalization of average tension on warp is regulated and controled when being difficult to high speed lopping braiding.
The content of the invention
The present invention is directed to deficiencies of the prior art, there is provided a kind of self-adapting type warp knit tension force intelligent equalization regulation and control
Method, effectively to solve in high speed warp knit knitting cycle, because warp tension peak value is excessive and tension fluctuation acceleration is excessive, and make
The coefficient of elasticity and fracture strength of paired warp raw material require the problem of too high.
First purpose of the present invention is to provide a kind of self-adapting type warp knit tension force intelligent equalization regulation and control method, methods described
Be using the anglec of rotation θ of tricot machine main shaft as time axis of abscissas, and with main shaft on the axis of abscissas often rotate one circle 360 °
Regulate and control basic cycle, and then the regulation and control cycle period that generation regulation and control basic cycle number is N along time shaft as a tension force；
Each regulation and control basic cycle is divided into four regulation and control periods；Within each regulation and control period, with warp knit tension force dynamic regulation value F
For axis of ordinates, dynamic regulation value F on axis of ordinates is with warp knitting technology using the method generation planned in advance, generating function
Traversing needle gage number goes to pin with traversing needle gage number and pin before the ratio of traversing angular interval width, pin before pin before pin in corresponding row
The back of the body swung the ratio of pin angular interval width and the ratio of the traversing needle gage number of needle back and the traversing angular interval width of needle back,
The traversing needle gage number of needle back and needle back are toward the piecewise function F (θ) that the ratio for swinging pin angular interval width before pin is the factor.
In one embodiment of the invention, the time axis of abscissas be tricot machine main shaft rotation angle, θ along when
Top-stitching increases and split the periodicity equivalent time axle after expanding.
In one embodiment of the invention, the division of four regulation and control periods is before completing pin using yarn guiding chase comb
Four angles of two lopping actions of traversing band yarn and the traversing band yarn of needle back are to be divided into four tune according to by the regulation and control basic cycle
Control the period.
In one embodiment of the invention, the yarn guiding chase comb completes traversing band yarn and the traversing band yarn two of needle back before pin
Four angles of individual lopping action are respectively the traversing angle at the end θ of needle back1, traversing start angle θ before pin2, traversing ending corner before pin
Spend θ3, the traversing start angle θ of needle back4。
In one embodiment of the invention, the regulation and control basic cycle number N in the regulation and control cycle period is warp knit
The flower high circulation course count of technique.
In one embodiment of the invention, the dynamic regulation value F is in four piecewise function tables regulated and controled in the period
Up to formula F (θ) as shown in formula (1)：
Wherein θ1、θ2、θ3、θ4Traversing starting before the traversing angle at the end of needle back of respectively yarn guiding chase comb corresponding to warp beam, pin
The traversing start angle of traversing angle at the end, needle back before angle, pin, Δ n1For traversing band yarn needle gage number before the n-th row pin, Δ n2For
The traversing band yarn needle gage number of n-th row needle back.
In one embodiment of the invention, the advance plane-generating opportunity of the dynamic regulation value F is：In four horizontal strokes
Move angle parameter correctly to set, after new weaving is loaded into system for weaving, before tricot machine starts weaving, complete dynamic
Regulate and control the pre-generatmg of curve.
Second object of the present invention is to provide above-mentioned self-adapting type warp knit tension force intelligent equalization and regulates and controls method in warp knit
Application.
Beneficial effect of the present invention
1st, the present invention is using yarn guiding chase comb progress overlap and the angular interval of underlap this mechanical properties, as
The partitioning standards of different regulation and control periods in the warp tension regulation and control cycle, with band yarn different from needle back before different row pins it is digital this
One process attribute, as the regulatory factor of warp tension regulation and control amplitude, it be able to can be generated before tricot machine starts production
The regulation and control curve in high product cycle period is entirely spent, belongs to the feedforward control planned in advance, so as to save yarn
Force snesor and tension test and pick-up reponse system, embodiment are more succinct efficient.
2nd, the present invention has considered the mechanical properties of tricot machine and the process attribute of warp knit product so that this warp thread
Power dynamic equalization regulates and controls different warp knitting technologies of the method for different warp knit types, and different type of machines, all has better
Good adaptivity.
3rd, the present invention is actively regulated and controled using active feed forward type, and warp tension peak value, which can be achieved, farthest to be reduced, and enters one
Step expands the range of choice of warp thread raw material.
Brief description of the drawings
Fig. 1 is average tension on warp cyclic graph；
Fig. 2 is the traversing band yarn action cycle figure of yarn guiding chase comb；
Fig. 3 is warp tension performance graph schematic diagram before and after regulation and control；
1 represents yarn dynamic tension before adjustment in Fig. 3, and 2 represent FiThe dynamic regulation planning curve of (θ), after 3 represent adjustment
Yarn dynamic tension actual change.
Embodiment
The essence of the present invention is directed in tricot machine production process, because the traversing band yarn motion of yarn guiding chase comb is caused each
In individual weaving cycle yarn consumption amount it is uneven caused by yarn peak value is excessive and high-frequency fluctuation, by using with traversing band yarn
Identical horizontal axis (angle of eccentricity) is reference in the Velocity Time coordinate system of motion, and to main shaft list in the reference axis
The consumption increment of yarn carries out differential on the angle step of position, and then calculates within a lopping cycle, the traversing band yarn before pin
Period, needle back traversing band yarn period, and the pin period is spent twice, altogether in four periods, identical main shaft angle increment is different
Angle of eccentricity position when, the consumption increment size of yarn, by planning in advance, actively makes up yarn on unit main shaft angle increment
The method of line length, realize that yarn tension peak value is cut down, fluctuate the dynamic regulation effect slowed down.
The present invention technical principle be：Root caused by warp tension when first, based in background technology to warp knit lopping
Understood with Analysis on Mechanism, in each 360 ° main shaft swing circle, namely in the weaving cycle of each warp knit row, be
The elemental motion of tricot machine lopping causes the fluctuation of warp tension and the generation of peak value, therefore can move each lopping
Make the cycle as the warp tension regulation and control basic cycle；Secondly, by each mechanism lopping action sequence of tricot machine and warp tension
The research of fluctuation pattern, Fig. 1 and Fig. 2 result of study can be obtained：Fig. 1 is illustrated in the weaving cycle of 360 ° of a main shaft
There is the angular interval position of peak tension twice in warp thread, and Fig. 2 illustrates corresponding sley bar in 360 ° of lopping cycles an of main shaft
Implement the angular interval with needle back traversing band yarn action twice before pin, by compareing for Fig. 1 and Fig. 2, warp thread twice in Fig. 1
The operating angle section of traversing band yarn almost fits like a glove twice in the angular interval and Fig. 2 of tension force generation fluctuation, and warp thread
Power peak-peak is appeared near 180 ° of main shaft, and warp tension second largest value is appeared near 0 ° of main shaft, and respectively with 180 ° and 0 °
Centered on symmetrical distribution, and the intermediate point of 180 ° of traversing actions exactly before pin, 0 ° be the traversing action of needle back intermediate point,
It follows that within a warp knit lopping action cycle, yarn guiding chase comb acts before pin with the traversing band yarn of needle back, be cause through
Yarn tension fluctuation and principal element caused by peak value；Finally, based on the foregoing description for regulating and controlling the basic cycle to warp tension, and
The analysis of principal element is produced to average tension on warp and peak value, the technical thought for proposing the present invention is：With the main shaft of tricot machine
Corner is the time axis of abscissas of tension force regulation and control, and tension force regulation and control amplitude is axis of ordinates, and in the time abscissa of the coordinate system
The period of tension force regulation and control is determined in each tension force regulation and control basic cycle on axle, that is, the angular interval regulated and controled can use yarn guiding chase comb
The angular interval of traversing band yarn and the traversing band yarn of needle back implementation is substantially all by a tension force regulation and control as partitioning standards before implementing pin
Phase is divided into four regulation and control periods, and this four regulation and control periods are determined by transverse-moving mechanism yarn guiding chase comb acting characteristic；Tension force regulation and control
Amplitude need to consider yarn guiding chase comb within each regulation and control basic cycle, and yarn is before pin with being consumed in the traversing angular interval of needle back
Different length, and run out of the time span spent by the length yarn；The length of yarn can use weaving in difference
In row adjacent band yarn number difference characterize, time span can with complete the traversing action angular interval width come table
Sign, therefore combine traversing angular interval width and traversing band yarn number difference, you can form and spend high course count same number
Tension force regulation and control the basic cycle, and then formed for complete process regulation and control cycle period.Regulate and control the basic cycle by multiple tension force
The complete regulation and control cycle period formed, had both contained the yarn guiding chase comb mechanism internal factor for causing average tension on warp, had included again
The digital technique external factor of traversing band yarn, that is, carry out warp tension dynamic equalization tune during flower high circulation braiding
During control, the mechanical properties of tricot machine and the process attribute of warp knit product have been considered, this allows for the dynamic of this warp tension
State equilibrium regulation and control method, for different tricot machine types, and different type of machines different warp knitting technologies all have it is good from
Adaptability, and the warp tension amount trimmed of each row can be calculated automatically according to technique band yarn number using it, so as to produce
Raw intelligent self-adaptive regulating effect.
Embodiment 1：
The Product Process that high course count is N is spent, its band yarn number is standard technology format write, and the i-th row and i+1
The band yarn number of row is：/……/d(i,1)-d(i,2)/d(i+1,1)-d(i+1,2)/ ... //, it is θ in the traversing angle at the end of needle back1、
Traversing start angle θ before pin2, traversing angle at the end θ before pin3, the traversing start angle θ of needle back4Yarn guiding chase comb on produce, its
At i-th row, i.e., the warp tension dynamic regulation planning value F in the i-th regulation and control basic cycleiCalculating function such as formula (2) institute of (θ)
Show, FiThe dynamic regulation of (θ) plans curve as shown in curve 2 in Fig. 3.Curve 1 represents yarn dynamic tension before adjustment in Fig. 3,
Curve 2 represents FiThe dynamic regulation planning curve of (θ), curve 3 represents yarn dynamic tension actual change after adjustment, due to two
Secondary traversing band yarn stage, the tension force dynamic adjustment direction for regulating and controlling curve are negative value, are in the non-band yarn stage (swinging pin) twice
On the occasion of, therefore the effect diagram after curve 1 is superimposed adjustment with curve 2 is shown in curve 3, fluctuation peak value is cut in, valley value
Elevated, general effect is that yarn dynamic tension is substantially equalized to average value.
Embodiment 2：
There is M on certain Warp Knitted Fabrics yarn guiding chase comb, respectively GB1、GB2……GBj……GBM, spend the high course count to be
N Product Process, wherein GBjCorrespondingly the band yarn number of the row of technique i-th and i+1 row is：/……/d(j,i,1)-d(i,i,2)/
d(j,i+1,1)-d(j,i+1,2)/ ... //, GBjThe traversing angle at the end of needle back be θ(j,1), traversing start angle θ before pin(j,2), before pin
Traversing angle at the end θ(j,3), the traversing start angle θ of needle back(j,4), then on the tricot machine jth yarn guiding chase comb GBjIn a regulation and control
Warp tension dynamic regulation planning value F in cycle period in any i-th of regulation and control basic cycle(j,i)The calculating function of (θ) is such as
Shown in formula (3)：
Although the present invention is disclosed as above with preferred embodiment, it is not limited to the present invention, any to be familiar with this skill
The people of art, without departing from the spirit and scope of the present invention, it can all do various change and modification, therefore the protection model of the present invention
Enclose being defined of being defined by claims.
Claims (8)
1. a kind of self-adapting type warp knit tension force intelligent equalization regulates and controls method, it is characterised in that methods described is with tricot machine main shaft
Anglec of rotation θ be time axis of abscissas, and 360 ° as one tension force of circle is adjusted so that main shaft often rotates on the axis of abscissas
Control basic cycle, and then the regulation and control cycle period that generation regulation and control basic cycle number is N along time shaft；By each regulation and control base
This cycle is divided into four regulation and control periods；Within each regulation and control period, using warp knit tension force dynamic regulation value F as axis of ordinates, indulge
Dynamic regulation value F in reference axis is generated using the method planned in advance, and generating function is to correspond to pin in row with warp knitting technology
Preceding traversing needle gage number goes to needle back to swing pin angle with traversing needle gage number and pin before the ratio of traversing angular interval width, pin before pin
Spend the ratio of interval width and the traversing needle gage of ratio, needle back of the traversing needle gage number of needle back and the traversing angular interval width of needle back
Number and needle back are toward the piecewise function F (θ) that the ratio for swinging pin angular interval width before pin is the factor.
2. according to the method for claim 1, it is characterised in that the time axis of abscissas is the angle of tricot machine main shaft rotation
Degree θ increases along timeline and split the periodicity equivalent time axle after expanding.
3. according to the method for claim 1, it is characterised in that the division of four regulation and control periods is to utilize yarn guiding chase comb
Four angles that two lopping of traversing band yarn and the traversing band yarn of needle back act before completion pin are to be divided according to by the regulation and control basic cycle
For four regulation and control periods.
4. according to the method for claim 1, it is characterised in that the yarn guiding chase comb completes traversing band yarn and needle back horizontal stroke before pin
Four angles for moving two lopping actions of band yarn are respectively the traversing angle at the end θ of needle back1, traversing start angle θ before pin2, it is horizontal before pin
Move angle at the end θ3, the traversing start angle θ of needle back4。
5. according to the method for claim 1, it is characterised in that the regulation and control basic cycle number in the regulation and control cycle period
N is the flower high circulation course count of warp knitting technology.
6. according to the method for claim 1, it is characterised in that the dynamic regulation value F regulates and controls point in the period at four
Section function expression F (θ) is as shown in formula (1)：
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Wherein θ1、θ2、θ3、θ4Traversing start angle before the traversing angle at the end of needle back of respectively yarn guiding chase comb corresponding to warp beam, pin,
The traversing start angle of traversing angle at the end, needle back before pin, Δ n1For traversing band yarn needle gage number before the n-th row pin, Δ n2It is horizontal for n-th
The traversing band yarn needle gage number of row needle back.
7. according to the method for claim 1, it is characterised in that the advance plane-generating opportunity of the dynamic regulation value F is：
Correctly set in four traversing angle parameters, after new weaving is loaded into system for weaving, before tricot machine starts weaving,
Complete the pre-generatmg of dynamic regulation curve.
8. application of the self-adapting type warp knit tension force intelligent equalization regulation and control method in warp knit described in claim 1.
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